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5.
Inspection and maintenance
IMPROPER MAINTENANCE
Strictly adhere to all test, inspection, troubleshooting and maintenance instructions.
Access to the control unit is restricted to the buzzer switch, restart mode selector switch, fuse replacement, and wire
connections.
Do not touch any other components inside the control unit.
Failure to comply with these instructions could result in death or serious injury.
IMPROPER MACHINE GUARDING PROTECTION
Refer to and comply with EN 999 and ANSI standards when calculating safety distances.
Select a safety light curtain with the proper protective (sensing zone) height to ensure an operator cannot reach a
dangerous machine operation.
The arrow labels located on the sides of the sensing units define the active sensing zone of the FF-LS30 Series light
curtain. The yellow tape located on the front plate of the sensing units defines an inactive non-sensing area. When providing
protection, ensure the danger zone is completely protected and within the sensing zone of the FF-LS30.
When using FF-LS Series for point-of-operation guarding, DO NOT allow an operator to stand or reach undetected between
the safety light curtain and dangerous machine operation.
If the FF-LS location allows possible access to dangerous machine operation, install additional protective safety equipment.
Ensure the location of the manual restart function is outside of the danger zone and provides the operator with a clear view
of the zone.
Ensure each safety light curtain activation immediately stops machine operation within the response time of the
components.
Ensure FF-LS status indicators (customer supplied) operate properly and are visible from the dangerous area.
Failure to comply with these instructions could result in death or serious injury.
IMPROPER ELECTRICAL INSTALLATION
Each safety light curtain activation must stop dangerous machine operation within the response time of the components.
Clearing the sensing zone must not start dangerous machine operation. When restarting machine operation, a normal
machine control start sequence must be used.
If electrical power is removed from a machine, its restoration must not initiate dangerous machine operation; a normal
machine control start sequence must be used.
If the safety light curtain is activated, the machine must NOT be able to restart.
The external safety relays located between the safety outputs of the FF-LS and the machine control circuitry must be
monitored.
If a component failure occurs, the machine control circuitry must still be able to stop dangerous machine operation and must
prevent the next machine cycle activation.
A Programmable Logic Controller (PLC) must NOT be able to override a manual restart function.
If the control unit operates in an automatic restart mode, another part of the safety control circuitry must keep the latched
function engaged.
To keep the latched function engaged and maintain control reliability, use safety components only. Do not use a PLC.
Strictly adhere to all electrical connection instructions and local wiring standards.
Failure to comply with these instructions could result in death or serious injury.
5.1.
Inspection
5.1.1.
Scheduled machine inspection
A knowledgeable person (understands this manual and local safety requirements) must inspect the machinery on a regular
basis (at least every 6 months) to ensure the installation of the machine control circuitry and protective safety equipment has
NOT been modified.
5.1.2.
Scheduled safety light curtain inspection
The following inspection must be carried out at power up, after any maintenance and daily by a knowledgeable person
designated by the machine user (for some machines, it may be necessary to keep a copy of the results near the machine).
Insert the test rod into the sensing field. In normal condition, a green output status indicator (customer supplied) goes to the
OFF state while a red output status indicator (customer supplied) goes to the ON state. Both green and red output status
indicators should remain respectively OFF and ON while the test rod is slowly moved up and down in the sensing field.
Inserting the test rod into the sensing field plane must be done at three different locations: near each sensing unit and in the
middle of the sensing field,
Inserting the test rod into the sensing field during the machine operation must immediately stop the dangerous movement.
107022-16 EN FR26 GLO 301 Printed in Germany
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